For medium-weight trail runners. For beginners starting out on trails. For light trail runners on hiking trails, gravel roads, etc. Hit the trails with this shoe optimized for cushioning, stability and energy return. It incorporates features that make your trail runs smoother, including the new MIZUNO ENERZY Foam in the sole for a softer feel and greater energy return when landing on the heel. The outsole is made of Wgrip rubber for enhanced grip, especially on gravel paths.